The "Update rig to 0.42" commit (cd580f3) accidentally reverted this
paragraph's `doubleo7` branding back to the old `deep_research` name and
degraded the prose along with it -- unrelated to the rig version bump.
Restore the rebranded wording from 5bb4ed1.
Ollama doesn't support tool_choice, so rig's tool-forced extractor
(client.extractor::<Review>()) never actually compelled the reviewer's
small local model to call the submit tool -- it just answered in prose,
and extraction exhausted its retries with "No data extracted" every time.
Switch to rig's typed-prompt API (agent.prompt_typed::<Review>()), which
uses Native output mode: Ollama's own `format` JSON-schema constraint on
the completion request, honored regardless of tool-calling ability.
Verified against a live local Ollama instance.
